Transport In The Body
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Name the four parts of blood
• Plasma • Red blood cells • White blood cells • Platelets
Describe the functions of plasma.
Transports substances like cells, hear and carbon dioxide around the body, it is a good solvent.
Describe the functions of red blood cells.
Transports oxygen around the body. It has adapted to do this due to its biconcave shape and they contain haemoglobin which oxygen attaches to easily. Haemoglobin gives them their red colour. You need iron to produce haemoglobin.
Describe the functions of platelets.
To clot the blood which prevents blood loss and the entry of microorganisms.
Describe the functions of white blood cells.
To fight against infection caused by microorganisms.
Where do arteries carry blood to?
Away from the heart.
Where do veins carry blood to?
Towards the heart.
What are capillaries?
Small blood vessels that connect veins and arteries.
Describe the path of blood through the heart.
Body > vena cava > right atrium > right ventricle > pulmonary artery > lungs > pulmonary vein > left atrium > left ventricle > aorta > body
Define pulse.
The alternate expansion and contraction of the arteries/a rhythmical throbbing of the arteries as blood is pushed through them
What is the average heart rate of an adult?
70BPM